Lamp mounting for certain optical instruments



May 1, m.-

R. H. WAPPLEW LAMP MOUNTING FOR CERTAIN OPTICAL INSTRUMENTS Filed March15, 1920 REINH OLD 15%55? TMM A TTORNE Y l atenterl ay ll, 'll llllilhB'IEINHUlLlU llil. WAJPPLER, 01F YONKERS, lll'l lll i TUBE,.l-lrlElElElIGI-IOR TO .tlMlElRIGAN CYSTO- FdUUlPE llttllllilldldfi,ltlll'll, it 'llOlitlE'UlEtllUlfION OF lillilllli YORK.

MOUNTING lEUlEt GERTATN OT'ULTGAL IhTETlEtUMEhTTS.

Application filed March 15 To all whom it may concern:

Be it known that l limnnorn ltl. l l ar- PLER, a citizen of the UnitedEitates, residing at Yonkers, in the county of d estchester tl and Stateof New York, have invented cerltl lid

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tain new and useful Improvements in Lamp Mountings for Certain Opticallinstruments, of which the following is a full, clear, and concisedescription.

My invention relates to lamp mountings for certain optical instruments,my general purpose being to enable the operator to quickly and easilylock the lamp in adjusted. position relatively to other parts.

More particularly stated, my invention deals with a miniatureincandescent lamp bulb having a hood. and provided with a threadedsupporting stem to be screwed into a lamp socket carried by a tubularsheath or optical barrel through which the operator gases by aid oflight from the lamp; and my improvement contemplates means whereby theoperator, in turning the lamp bulb, incidental to screwing the stemthereof into the lamp socket, can always leave the lamp socket in suchposition that the lamp window occupies a predetermined normal positionrelatively to other parts.

Reference is made to the accompanying drawing forming a part oi thisspecification, and in which like reference characters indicate lilreparts throughout the several fig-- ures.

Figure l is a side view, partly in elevation and partly in section.showinn one torm ol': my invention as applied to a cystoscope.

Figure 2 is a plan view oil the device shown in Figure "l.

Figure 3 is an enlarged tranmentary sec-- tion. corresponding: to aportion oi Figure l.

Figure lis a vertical longitudinal section through a certain form otendoscope. equipped with a term of my invention dit l erinsr from thatappearing in Figures 'l. and 2.

Figure 5 a section on the line tie-All cit lligure 4, looking. in thedirection indicated by the arrows.

The optical barrel cit a cystoscope shown at 4:. and is made oi metal.The eye piece appears at 5. a lens at 6. and a speculum at i; Thisspeculum is of the type known as a. three-quarters sphere. lit would bespherical iaao.

except for the tact that about one-quarter oi it is cut away. llwedgeshaped base 8, housed within. the barrel 4:, is used in sup portingthe speculum.

The optical barrel. lis provided with an upturned cylindrical endportion 9, threaded internally at and serving; as a lamp socket. Fittedinto this socket is a bushing 11 of insnlatingmaterial. carrying acontact member 12 ct metal. This contact member is provided with asprint; portion 1%. Connectedwith the contact member 12 is an in?sulated wire 13. leading; to a binding post 14:. carried by the barrel4: and insulated therefrom. Another binding" post 15 is mounted upon thebarrel 4: and is in metallic contact therewith.

A miniature incandescent lamp bulb 16 carries a lamp hood 17, made ofmetal and provided with a window 1.8. The lamp bulb is provided with athreaded sleeve 19, carrying; a cylindrical member 1.9 of insulatingmaterial. of the hind. commonly used with lamp bulbs this type. and isturther pro vided with the usual centrally-disposed contact button 9.0.The threaded supporting stem 19 and the contact button 20 are connectedwith the lamp filament, shown at 2.1.

The parts are so proportioned and arranpje'd that the contact button 20,carried by the lamp bulb. can be brought into engagement with thecontact member 12 by screwing the stem 19 into the socket 9.

it. looking: ring]: is revolubly mounted upon the threaded stem 19. andtor this purpose is threaded internally. This locking rinrr servesgenerally the purpose of a jam nut. l l 'hen lorced tightly against thead jiacent end portion 9 of the barrel t. it loclzs the lamp stem 19rigidly in. relation to the barrel. ln doing this. it v rtually locksthe lamp bulb. and the hood 17 carried thereby, rigid relatively to thebarrel. When this is done. there is usually a slightspace between theloclrinc; vine. 22 and the adjacent end portion oil the lamp hood.

The contact button E20 should always be in actual cu, m ment with thecontact menu" her 'lil hetero the locking: rinp; is torced against theportion 9 oi the barrel.

The purpose of the locking ring: 23 is to so secure the stem 10 and. allparts carried thereby as to leave the window 18 facing in lit;

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exactly the same radial direction as the exposed portion of the speculum7.

lVith the device in the condition just described, the lamp circuit maybe traced as follows: Binding post ll, wire 13, contact member 12,contact button 20, lamp filament 21, stem 19, barrel 4:, binding post 15to source of electricity (not shown), and thence back to binding post14. This circuit energizes the lamp.

Except for the use of the locking ring 23, in the relation abovedescribed, the lamp window might face in almost any radial directionwhen the lamp stem reaches the limit of its travel in the socket.

Since incandescent bulbs of this type are renewed quite often, and sinceas a rule such lamp bulbs are not exactly alike, it may readily be seenthat special provision is necessary in order to enable the lamp windowto be brought into exact registry with the exposed portion of thespeculum 7, as above described.

In Figures 4: and 5 I show another form of my device, applied in thisinstance to an endoscope.

The barrel of the endoscope appears at 24: and the eye piece at 25.lWounted within the barrel is a lens 26. supported in position by amounting 27. Theeye piece 25 carries a supporting pin 28, and mountedupon the latter is a plate 29. The upper end of this plate serves as alamp socket and is suitably formed for the purpose.

An incandescent lamp bulb is shown at 30, and is provided with athreaded stem 31. A locking ring 32 is revolublyfitted upon this stem,and serves to lock the stem 31 rigidly in relation to the plate 29.

The incandescent bulb is provided with a filament 33, having the form ofa fiat loop, as shown. hen the device is in active use, the plane of thefilament should be vertical. This is on account of the optical relationsof the filament to the lens 26, and to the position of this lensrelatively to the barrel 24, That is to say, the distribution of thelight from the filament should always be such. as to enable the operatorto look through the barrel 2% by glancing over the top of the plate 29,and experience shows that with the operator thus looking through thebarrel the light is distributed to the best advantage when the generalplane of the filament is strictly diametrical relatively to the barrel,and therefore vertical as the device is normally used. Another way ofstating practieallvthe same thing is, that the lens 26 distributes thelight to better advantage if the filament occupies a vertical planecross ing the optical center of the lens.

The lamp bulb 30 is first adjusted by turning it until the plane of thefilament occupies the position just described, and then the locking ring32 is jammed against the plate 29, so as to lock the bulb rigidly in po.sition.

Thus in a general way the function ol lhe locking ring 32 is closelyanalogous to that of the locking ring 22 above described.

I do not limit myself to the precise mechanism shown, as variations maybe made therefrom without departing from my invention, the scope ofwhich is commensurate with my claims.

Having thus described my invention. what I claim as new and desire tosecure by lieters Patent is as follows:

1. In a device of the character described the combination of an opticalbarrel. a lamp socket carried by said optical barrel, an incandescentlamp bulb provided with a stem fitting into said lamp socket in order losup port said incandescent lamp bulb thereupon. so that said lamp bulbmay be turned relu tively to said socket and means controllable at thewill of the operator for securing said stem in different radialpositions relativelv to said socket.

2. In a device of the clnn'acter described the combination of an opticalbarrel, :1 lump socket carried by said optical. barrel, an incandescentlamp bulb provided with a stem fitting loosely into said lamp socket inorder to support said incamlescent lamp bulb thereupon so that said lampbulb may be turned relatively to said socket, and a. clamping ringmounted upon said stem for the. purpose of locking said stem relativelyto said socket. I

3. The combination of a lamp socket provided with a thread, anincandescent lamp bulb provided with a thread for engaging the thread ofsaid lamp socket in order to support said incandescent lamp bulbthereupon so that said bulb may be turned relatively to said socket, anda clamping ring mounted upon said stem and revoluble relatively theretoin order to jam against said socket and thus to hold said lamp bulb indifferent radial positions relatively to said socket. I

4-. The combination of an optical barrel. an incandescent lump bulbsupported by said barrel and adjustable relulivcly lbcrclo ilor thepurpose of enabling the operalor lo see through said optical barrel. andmeans controllable at the will of the operator l'or clai'nping said lampbulb in any predeler mined one of an iuliuite number of positionsrelatively to said barrel.

5. The combination of an optical barrel. :1 speculum carried thereby and'lucing ru dially therefrom, a hood mounted upon said optical barrel andprovided with :1 window. said hood being rovolublc relatively to saidbarrel in order to turn said window relatively to said speculum, a lampmounted within said hood and adapted to shed light through said window,and means controll, 4t fill ,til W" lable at the will of the operatorFor clamp-- li'lin carried bv said barrel and lae ra dially tberei" i.an. incandescent l bulb provided with a threaded portion engaging" saidthreaded portion olfsaid barrel, a clamping; ring carried by saidthreaded por tion of said lamp and fitted so that the will of theoperator said clamping: ring; may be jammed against said barrel, so asto se cure said in lescent lamp bulb in prom determined positionrelative to said barrel, and a hood mounted upon said incandescent "lampbulb and provided with a Window wl'iioli tacos radially therefrom.

7 The :ombination of an optical barrel provided with a threaded portion,a spewlum married by said barrel and facing radially tlieetrom a lampprovided With a threaded stem for engaging said threaded portion of saidbarrel, so that said lamp may be turned relatively to said barrel alocking; ring revolubly mounted upon said stem and adapted to be jammedagainst said barrel in order to look said lamp in a predeterminedposition relative to said barrel and a shielding member carried by saidlamp and adjustable therewith relatively to ii d barrel, said shielding;member having a window so positioned. that the adjustment of said lzmrpbrings said Window into a predetermined position relative to saidspeculure.

ltlfllNl-IQLD H. VVAPPLIER.

